Clutch



G. W. D OYLE Aug. 23, 1932.

CLUTCH Filed Aug. 26, 1927 lNvENToR y v ,ZMML

ATTORNEYS` eEoRGE W. noYLE, OE ROME, NEW YORK, Assi'GNOR ToAi'iERrciiN-GANjooiviiANY,V OE

PATENT OgFFIC/EQ j y NEW YORKN. Y., A CORPORATION OE NEW `JERSEY CLUTCHApplication led August 26,1927; Seria1.NO.,215,579.

Vfhis invention relates in general to a magnetic clutch, and hasV moreparticular reference to a disengaging means for preventing a continuanceof the driving connection7 due to residual magnetism in the clutch partsafter the energizing current is cut off.

Y In connecting members forrdriving engage? ment by means of a magneticclutch,l it has been found that the necessary iron and steel parts donot immediately release when the electrical current is cut off, due tothe residl ual magnetism in these parts, with the result that thedriving. connection is sometimesV Numerous other objects and advantagesofA the invention will be apparent as it is better understood from thefollowing description,

which, taken in connection with the accom-` panying drawing, discloses apreferred embodiment thereof.

ln t ie drawing:

Figure 1 is an elevation, with parts broken away and in section, of aclutch embodying the present invention;

Fig.V 2 is a section taken on the line 2-2 of Fig. l, showing an endview. of the clutch and TEig. 3 is detail view of one of the brushholding arms. 1

Referring more particularly to the drawe ing, a pulley 5 is freelyVmounted by means of a sleeve 6 upon a drive shaft 7 supported inbearings 8. At one end of the pulley is a plate or armature member 9 offerrous metal which is attracted by the clutch magnet.

.i clutch member 10 is secured to the shaft 7 by means of a key y11adjacent to the pulley Y through the body of the member 10 and outer rimle thereof and the adjacent plate 9 of the pulley 5, thus drawing thepulleyl andthe member 10 with the plate 9 together in coni plate 9.

tact'.` i In the fixed clutclimember 10 adjacent the shaft 7 are anumber of lioles`15 threaded at one .end andl reduced .at the other forrey ceiving headed bearing pins 16` projecting from the'face of themember 10 toenga'ge the Seated in each hole` 15 isfac'oil spring .17which is held in place by' a screw 18 and tends toforce the pinv16rtoproject from the face of the member 10'.` These pins i 16 ythus act asthrustpins for engaging the 'plate' 9 to press-itfawayifr'omtlieclutch'l member 10 fixed onthe shaft. Thesethrust pins 16 are madeof non-ferrous metal, such as brass or copper, which are substantiallyincapable of residual magnetism and, there-4 fore, asjsoonas current iscut 'off in thercoil 13'the' pins actuated by their springs 17 press theyplate 9 with the pulley 5V and the xe'd Y n clutch member 10 out ofengagement,

In order to supply current to the field coilkv 13,`contact rings 19 and2O are mounted.uponv j but insulated from an extension 21 of the clutchmember-"10, having conductors 22.2and

23 leading from the ends of the coil 13 to the. separate contact rings.A pair offbrush 'holders '24 andV 25 are pivoted in a support 26overlying the shaftp7, and each lcomi prises za brush holding bracket 27which maybe -secured to either side of .the arm vi 21for .25 'forholdinga brush 28V or 29 'in Vengagement with its respective'` 'contact ring 19or 20. Eachicontact arm is drawn in the'direction of itsy contact ring,by means of v-a spring 30 secured at one end to the arm .and 'at theother end toaneye 31 on thejsupport'26. Connected with the arms. 24C`and .25 are conductors 32 andl 33jforsi'ipplyingV current to the fieldcoil 18 as desired.l

`With this construction, it is obvious that tothe shaft 7 for a drivingconnection, andas' soon as current is cut oiffrom the field coil 13, thenon-magnetic thrust pins 16. operate to` press the ixedclutch1memberandpulley j apart by their engagement withthe contactkr plate 9, therebyVpreventing a continuance of l the driving connection between the partsdue Y iinalected thereby.

to residual magnetism, the thrust pins being It is thought that thisinvention and many of its attendant: advantages will be under- 5 stoodfrom the foregoing description, and it Y will beapparentthatzmanyLchangesi may fbe i made iirtlie form, construction'and arrange'- ment ofAthe partsV without departing from the spirit-and.-.seope of theinvention. or? sa A* v10 freeing au" of 'as materiaradifanmgathe, f

form hereinbefore deserbedbeing merely a v `preferredembodiment thereof.Y

Ifclaim: Y Y Y .f v Y l. Inaehiteh,relativelyinovablefoperatingY'. Y

"l5 parts,;an eleotromagnetic clutch mechanism.'

y" i toje'onnectithe partsV tbgetherA fr-.driving vmovement;andliionem'agnetie means fr-ferr? l ingsa'id parts.entirelyout'of driving Contact with veach other; said'elut'chmeeharxism`Coma apulleyanda separate"arinatixrte'platesfeeured"at`,the sidel ofthe pulley' to. rotate therev'vith;` v Y' Y Y1211 afvclteh, apulley andlanelectro;magg v K- *netL relL'itivelyymovable, means for supplyingA 219v elirrentltftliemagnetto eonneet it'for rdrivL vniger1g agementiwith the pulleyandmetallie p vfnonfferroii's, mee-.ns1V unai'e'etedV residi'iafl;y magnetismqtoseparategthe p arts"and"slidab'ly eiigagingoneoflthem lv`vl1ernth"ecurrent' is eut'.

, @emanati-1anempfangene*ppuueyand e .i separate armaturefplatesecured'at the side of; f Y stlienpulleyt'ootatetherewith` Y j l 31Inr'afcliit'ch,apyul1ey, a. magnetie cltcl ymemberrandiafslaftuponQvvhiel they are b'oth :s mounted; slicliilgspring; pressed pins sub--V stantially; ineapfable` ol-residiial"magnetism;

moutedlinthebody, ofth'ema'gnet element'V andbearngyieldingly agjaihstthearmaturef axdfmeansfr, supplying current tothe clutch?, 4'meinbento overcometheiyielliiigbearingioril driviiiggtle p iilleyan'danemherrtogether. g

s4; In aoluft'cli, apull'eyhavingan,armature.

ashatrupon Whielitiis ino.unte.d"a magnetic;- cliitoh membensecured '.tothe. shaft; lanclnoih- Y w magnetic sprngpressedbea-ringpinscarredlliyfone ofthefsaidmembers and; yielldiigly, v heldin engagement withtheothermember; f lfixfaroliitchrarotatable diivingshaft, Qa,

piilleyg loosely mountedthereon ear?V Y, nyingmagnetie'plate on onesiderfaeethereff'- 7 v ofQfa el'teh inemhier.- keyedto the shaft" atthea plateside ofthe pul'ley'and' constructed offer"-l rous` metal;Yspring pressed", bearing; p ins of nsomferrnusunetalfearried"by vthememberand v piijojeeti'nig'n from jth'e" face thereoffinvx Contact*Vvvitlrth'e platelcarrie'd i by then pulley; and an eleetronflagnetio`vviire'lingjv mountedonf the.: membervhavi-ngfmeansfonsnpplyngfan trie.ourrentl theretogrto l attract -.theo plate for; driving.jconnectioniwithithe :pulley-and rovere come!theoseparatnggpressure ofYthe bearing;

Y GEQRGEWL-DQYLEMA- s l

